This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: While examining the spectrum of a galaxy, you find all the hydrogen lines are shifted to longer ... (Read 127 times)

amal

  • Hero Member
  • *****
  • Posts: 572
on: Jul 27, 2018
While examining the spectrum of a galaxy, you find all the hydrogen lines are shifted to longer wavelengths. This galaxy is
 
  A) moving away from us.
  B) moving towards us.
  C) not forming new stars.
  D) expanding explosively.
  E) blueshifted.

Question 2

What was most surprising about SN1987A?
 
  A) Its pulsar appeared within weeks of the explosion.
  B) The supernova was luminous enough to see with the naked eye.
  C) The supernova was not even in our own Galaxy.
  D) The parent star was a blue supergiant, much like Deneb or Rigel.
  E) It did not produce the flood of neutrinos our models had led us to expect.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Liddy

  • Sr. Member
  • ****
  • Posts: 342
Reply #1 on: Jul 27, 2018
Answer to Question 1

A

Answer to Question 2

D


amal

  • Member
  • Posts: 572
Reply 2 on: Jul 27, 2018
Wow, this really help

rachel

  • Member
  • Posts: 323
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Though Candida and Aspergillus species are the most common fungal pathogens causing invasive fungal disease in the immunocompromised, infections due to previously uncommon hyaline and dematiaceous filamentous fungi are occurring more often today. Rare fungal infections, once accurately diagnosed, may require surgical debridement, immunotherapy, and newer antifungals used singly or in combination with older antifungals, on a case-by-case basis.

Did you know?

More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.

Did you know?

There are more nerve cells in one human brain than there are stars in the Milky Way.

Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

Did you know?

Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

Determining an Absorption Spectrum Determining an Absorption Spectrum
Hydrogen Molecule Hydrogen Molecule
Risk of death from motorcycle accidents (dashed lines) and passenger accidents (solid lines) per 100 Risk of death from motorcycle accidents (dashed lines) and passenger accidents (solid lines) per 100
This chart shows the various lines of responsibility and how they differ in presidential and parliam This chart shows the various lines of responsibility and how they differ in presidential and parliam
Assisting the patient to transfer from the bed or examining table to a wheelchair. Assisting the patient to transfer from the bed or examining table to a wheelchair.
The Visible Spectrum of Electromagnetic Energy The Visible Spectrum of Electromagnetic Energy
Video: Junction Types - Tight and Adherens Junctions

For a complete list of videos, visit our video library